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신속 진단 킷트를 활용한 한우 송아지의 설사증 원인체 검사
최창용 ( Changyong Choe ),정영훈 ( Young-hun Jung ),도윤정 ( Yoon-jung Do ),조아라 ( Ara Cho ),김성범 ( Seong-bum Kim ),강희성 ( Hee-sung Kang ),류재규 ( Jae-gyu Yoo ),박진호 ( Jinho Park ) 한국동물위생학회 2017 한국동물위생학회지 (KOJVS) Vol.40 No.1
Calf diarrhea is a disease experienced by almost all of calves after birth and is one of the representative causes of damage to farmers due to mass mortality and of economic losses to them by inhibiting normal growth. In this study, we conducted quick detection of etiologic agents of diarrhea by using a rapid diagnostic kit to multiply diagnose antigens of five etiologic agents of calf diarrhea (rotavirus, coronavirus, Escherichia coli, Cryptosporidium, Giardia) in Hanwoo (Korean native cattle) calves. When the positive antigen proportion of the calf diarrheal feces for each farm was analyzed, rotavirus, coronavirus, Escherichia coli, Cryptosporidium, and Giardia showed antigen positive rates of 0∼67%, 0∼20%, 0∼60%, 0∼20%, and 0∼67%, respectively. With regard to the antigen positive rate by age in days after birth, 1-week-old calves showed the antigen positive rate of 20% in rotavirus and 20% in Giardia, and 2-week-old calves showed that of 50% in rotavirus. In addition, 4-week-old calves showed the antigen positive rate of 10% in rotavirus, 10% in coronavirus, 10% in Escherichia coli, and 30% in Giardia, and 8-week-old calves showed the antigen positive rate of 17% in coronavirus, 50% in Escherichia coli, 17% in Cryptosporidium, and 33% in Giardia. Based on the results of this study, the etiologic agents of diarrhea in Hanwoo calves for each farm are widely distributed. Although younger than 2-week-old calves were strongly positive for rotavirus, older than 4-week-old calves were highly positive for Giardia and Escherichia coli. In conclusion, we considered that a rapid diagnostic kit is an effective method for quick detection of etiologic agents and would be helpful for cattle farmers and veterinarians to select appropriate therapeutic method.
최창용 ( Changyong Choe ),정영훈 ( Young-hun Jung ),도윤정 ( Yoon-jung Do ),조아라 ( Ara Cho ),강석진 ( Seog-jin Kang ),김의형 ( Ui-hyung Kim ),김찬란 ( Chan-lan Kim ),신상민 ( Sang-min Shin ),류재규 ( Jae-gyu Yoo ),탁동섭 ( Dongs 한국동물위생학회 2018 한국동물위생학회지 (KOJVS) Vol.41 No.1
The best way to prevent foot-and-mouth disease (FMD) constantly occurring in Korea will be vaccination. In this study, FMD vaccines were given to Korean native cattle (Hanwoo), dairy cattle, and pigs to investigate the antibody positive rate of FMD vaccine by age in year and month. Hanwoo, dairy cattle, and pigs showed antibody positive rates of 99.5%, 97.7%, and 95.9%, respectively. High antibody positive rates more than 95% were found in Hanwoo and dairy cattle. In particular, high antibody positive rates were found in Hanwoo and dairy cattle regardless of age. Pigs showed a relatively low antibody positive rate of 57.6% at 3 months of age and then constantly maintained a high antibody positive rate of above 95.0% after 4 months of age. As a result of this study, high antibody positive rates were found when regular FMD vaccination was given to newborn calves and piglets after FMD vaccination twice to them. Therefore, it is considered the most important to receive vaccination thoroughly according to vaccination plan in order to prevent FMD.
면역 크로마토그래피법을 이용한 국내 반려견의 Dog erythrocyte antigen 1 분포도 조사 연구
김은주,최창용,류재규,오상익,정영훈,조아라,김수희,도윤정,Kim, Eunju,Choe, Changyong,Yoo, Jae Gyu,Oh, Sang-Ik,Jung, Younghun,Cho, Ara,Kim, Suhee,Do, Yoon Jung 대한수의학회 2018 大韓獸醫學會誌 Vol.58 No.2
Blood group determination in dogs is an important factor in transfusion medicine to minimize immediate or delayed adverse reactions after red blood cells transfusion in small animal clinics. Dog erythrocyte antigen (DEA) 1 is the most important blood type due to its high degree of antigenicity causing acute transfusion adverse reactions. The aim of this study was to investigate the prevalence of DEA 1 in various dog breeds in Korea. As a result of testing 592 blood samples from more than 35 dog breeds, DEA 1 blood typing for each breed showed that 57.8% of Malteses, 63.3% of Poodles, 76.2% of Mastiff-like dogs, 72.5% of Pomeranians, 47.7% of Shih Tzus, 70.3% of mixed breeds, 60.0% of Yorkshire Terriers, and 71.4% of Beagles were DEA 1-positive. Miniature Schnauzers and Jindo breeds had a significantly high prevalence (100%) of DEA 1-positive dogs compared to that in other small breed dogs. This is the first report of immunochromatography-detected DEA 1 prevalence in various domestic dog breeds. Although additional studies need clarifying the potential blood transfusion risks in domestic breed dogs with DEA 1, the results of this study may be useful when selecting a blood donor.
대규모 한우 번식 목장에서의 10년간 송아지 폐사 원인
김의형,정영훈,최창용,강석진,장선식,조상래,양병철,허태영,Kim, Ui-Hyung,Jung, Young-Hun,Choe, Changyong,Kang, Seog-Jin,Chang, Sun-Sik,Cho, Sang-Rae,Yang, Byung-Chul,Hur, Tai-Young 대한수의학회 2015 大韓獸醫學會誌 Vol.55 No.2
Calf losses have an economic impact on larger Korean native cattle (KNC) breeding farms due to replacement, productivity, and marketing. However, little research on KNC calf mortality or causes of calf death on large-scale breeding farms has been conducted. Based on medical records and autopsy findings from the Hanwoo experimental station of the National Institute of Animal Science, calf death records from 2002 to 2011 were used to identify the causes of mortality. Mortality rate of KNC calves was 5.7%. Large differences (1.8~12.6%) in yearspecific mortalities were observed. Calf deaths were due to digestive diseases (68.7%), respiratory diseases (20.9%), accidents (6.0%), and other known diseases (2.2%). The main cause of calf death was enteritis followed by pneumonia, rumen indigestion, and intestinal obstruction. The greatest number of calf deaths occurred during the fall followed by summer. These results indicated that enteritis and pneumonia were the main reasons for calf death. However, autopsy findings demonstrated that other factors also caused calf death. This study suggested that seasonal breeding and routine vaccinations are the most important factors for preventing calf death, and improving calf health in high land areas with low temperature.
한우의 정상 난포와 난포낭종 난포에서 Aquaporin7 발현 양상
김창운,한신규,최창용,Kim, Chang-Woon,Han, Sunkyu,Choe, Changyong 한국수정란이식학회 2015 한국동물생명공학회지 Vol.30 No.1
Alteration in ion channel or transporter expression levels affects cell volume which is produced by movement of water and ion across the plasma membrane. In particular, aquaporin (AQP) channels among ion channels play a crucial role in movement of water across the cell membrane. This study was performed to identify whether AQP expression is changed in bovine follicular cystic follicles using microarray, RT-PCR and Western blotting analyses. In microarray data, AQP4 expression was decreased, whereas AQP7 was increased in cystic follicles. Additional experiments were focused on the AQP7 expression increased in cystic follicles. The microarray data was confirmed by semi-quantitative polymerase chain reaction (PCR) and Western blot analysis. AQP7 mRNA and protein expressions were significantly increased in the cystic follicles (p<0.05). Application of estrogen ($10{\mu}g/ml$) to bovine ovarian cells showed a trend of increase in AQP7 expression. From these results, we suggest that the increase in AQP7 expression in cystic follicles may play an important role in movement of water in bovine ovary. In addition, AQP7, a aquaglyceroporin permeating water and glycerol, could be a good target in development of methods for the cryopreservation of bovine ovary.
전라북도 지역 동물병원에 내원한 반려견의 주요 품종별 질환 양상 조사
김은주 ( Eunju Kim ),최창용 ( Changyong Choe ),류재규 ( Jae Gyu Yoo ),오상익 ( Sang-ik Oh ),정영훈 ( Younghun Jung ),조아라 ( Ara Cho ),김수희 ( Suhee Kim ),도윤정 ( Yoon Jung Do ) 한국동물위생학회 2018 한국동물위생학회지 (KOJVS) Vol.41 No.2
Recently, demographic studies of veterinary medical database have been conducted to understand patterns of disease occurrence. Understanding incidence of breed-related disease would provide appropriate guidance for future health care strategies and offer useful information for early diagnosis of disease. However, in veterinary medicine, theses research has not yet been investigated in the Republic of Korea. The purpose of this study was to investigate the prevalence of common medical disorders among dog breeds examined at primary-care veterinary clinics in Jeollabuk-Do, Republic of Korea. The data were analyzed based on World Health Organization’s International Classification of Disease. A total 13,176 medical records of canine patients were analyzed from six primary veterinary clinics in Jeollabuk-Do from January to December 2016. Results showed that the most common health problems were ‘disease of skin’ (17.7%); followed by ‘diseases of digestive system’ (12.26%), ‘preventive medicine’ (10.08%), and ‘diseases of ear and mastoid process’ (10.4%). In seven out of ten breeds, the most common medical disorder was skin disease. For poodle such as Pomeranian and Chihuahua, digestive system disease was most prevalent. On the other hand, respiratory system disease was found to be higher in Pomeranian than other breeds; while ear and mastoid process disease was most common for Maltese and Poodle. This study can help owners, breeders, and veterinarians prevent and manage various diseases of popular breeds in Jeollabuk-Do in the future.
국내 반려견의 품종에 따른 혈구 및 생화학 수치 비교 연구
김은주 ( Eunju Kim ),최창용 ( Changyong Choe ),류재규 ( Jae Gyu Yoo ),소경민 ( Kyoung-min So ),정영훈 ( Younghun Jung ),조아라 ( Ara Cho ),김수희 ( Suhee Kim ),오상익 ( Sang-ik Oh ),도윤정 ( Yoon Jung Do ) 한국동물위생학회 2018 한국동물위생학회지 (KOJVS) Vol.41 No.1
Hematological and serum biochemical analyses are routinely used to screen dogs for disease and monitor their clinical progression. These values in dogs may be affected by internal factors, such as breed and age, and external factors like environment, diet, and lifestyle. Apparently, subclinical breed-related variations in hematologic and serum biochemical results have been characterized for Bernese Mountain dogs, Alaskan Malamutes, English Setters, and Golden Retrievers. It is possible that some breed-related differences in clinical pathology analyses may reflect evidence of underlying disease and impact clinical decision plan. In this study, we estimated hematologic and serum biochemical parameters in small breed dogs and compared among four different breed dogs. Blood samples were collected from 38 domestic dogs that were 10 Beagles, 9 Malteses, 10 Poodles, and 9 Miniature Schnauzers. In terms of RBC count, Beagle (7.2±0.24×10<sup>3</sup> cells/ L) showed significantly (P<0.05) higher count than other breeds (Maltese, 6.51±0.25×10<sup>3</sup> cells/ L; Poodle, 6.35±0.24×10<sup>3</sup> cells/ L; and Miniature Schnauzer, 6.35±0.25×10<sup>3</sup> cells/ L). For MCV, Miniature Schnauzer (67.05±0.84 fl) results were significantly (P<0.05) higher than Beagle with 64.33±0.8 fl. For cholesterol value, Beagle (163.3±9.15 mg/dl) had significantly (P<0.05) higher values than Miniature Schnauzer with 119.12±9.64 mg/dl. There was no statistically difference among breeds in terms of enzyme markers of liver diseases. In conclusion, data obtained from this study may be valuable as breed-related variability for interpretation of the results in hematologic and serum biochemical analysis among four small breed dogs.
한우에서 거세에 의한 Testosterone 결핍이 사이토카인의 변화에 미치는 영향 연구
김성범 ( Seong Bum Kim ),조아라 ( Ara Cho ),최창용 ( Changyong Choe ),정영훈 ( Younghun Jung ),류재규 ( Jae Gyu Yoo ),김은주 ( Eunju Kim ),도윤정 ( Yoon Jung Do ) 한국동물위생학회 2017 한국동물위생학회지 (KOJVS) Vol.40 No.4
The purpose of this study is to determine the changes of cytokines and immune cells in blood in castrated Hanwoo. The cytokine production and the number of immune cells were determined by collecting blood from jugular vein before castration and on 1, 7, and 28 days then after. Results of the hematological test showed that the number of leukocyte tend to increase after castration, and it significantly decreased on day 7 and day 28 (P<0.05). Lymphocytes decreased significantly on day 1 and 7 (P <0.05), and then recovered as in neutrophils on day 28. The levels of serum testosterone, TNF-a, IL-6, and anti-inflammatory IL-10 significantly decreased (P<0.05) after castration. There was also a decrease in IL-2, IFN- γ, and IL-4 but showed no significant difference when compared to intact ones. These results suggest that testosterone-deficiency does not affect the number of immune cells in blood, but has a close relationship with cytokine production.